The Yealink W70B is an IP DECT base station for small and medium-sized businesses. Paring with up to a total of 10 Yealink W73H, W59R, W53H* or W56H* DECT handsets, the W70B allows you to enjoy superb mobility and efficient flexibility as well as significantly eliminating additional wiring troubles and charges. * Due to the performance of the handset, only the W73H and W59R supports no perception upgrade.